Procedure:Cook the pineapple with the lemon juice, salt , rum butter and sugar in a pan, cook until it becomes a jam. Remove and let cool completely at room temperature.
Heat oven to 425 ° F. fills the pie crust mold, and put up another crust on top, pressing to close it. Make a small cut with a razor or sharp knife .
Bake for 35-40 minutes, until golden brown and filling shows a bit in the cut. Remove and let it cool completely.